Advances in nano research

  • 제16권1호
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  • Pages.91-109
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  • 2024
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  • 2287-237X(pISSN)
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  • 2287-2388(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Random topological defects in double-walled carbon nanotubes: On characterization and programmable defect-engineering of spatio-mechanical properties

  • A. Roy (Department of Mechanical Engineering, National Institute of Technology Silchar) ;
  • K. K. Gupta (Amrita School of Artificial Intelligence, Amrita Vishwa Vidyapeetham) ;
  • S. Dey (Department of Mechanical Engineering, National Institute of Technology Silchar) ;
  • T. Mukhopadhyay (Department of Aeronautics and Astronautics, University of Southampton)
  • 투고 : 2022.05.18
  • 심사 : 2023.12.04
  • 발행 : 2024.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Carbon nanotubes are drawing wide attention of research communities and several industries due to their versatile capabilities covering mechanical and other multi-physical properties. However, owing to extreme operating conditions of the synthesis process of these nanostructures, they are often imposed with certain inevitable structural deformities such as single vacancy and nanopore defects. These random irregularities limit the intended functionalities of carbon nanotubes severely. In this article, we investigate the mechanical behaviour of double-wall carbon nanotubes (DWCNT) under the influence of arbitrarily distributed single vacancy and nanopore defects in the outer wall, inner wall, and both the walls. Large-scale molecular simulations reveal that the nanopore defects have more detrimental effects on the mechanical behaviour of DWCNTs, while the defects in the inner wall of DWCNTs make the nanostructures more vulnerable to withstand high longitudinal deformation. From a different perspective, to exploit the mechanics of damage for achieving defect-induced shape modulation and region-wise deformation control, we have further explored the localized longitudinal and transverse spatial effects of DWCNT by designing the defects for their regional distribution. The comprehensive numerical results of the present study would lead to the characterization of the critical mechanical properties of DWCNTs under the presence of inevitable intrinsic defects along with the aspect of defect-induced spatial modulation of shapes for prospective applications in a range of nanoelectromechanical systems and devices.

키워드

과제정보

TM would like to acknowledge the support received through the Science and Engineering Research Board (Grant no. SRG/2020/001398), India.

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